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The osphradium is the olfactory organ in certain molluscs, linked with the respiration organ. Olfaction (also known as olfactics or smell) refers to the Sense of smell. Molluscs are animals belonging to the phylum Mollusca. There are around 250000 extant Species within the phylum with an estimated 70000 In living organisms a respiratory system functions to allow Gas exchange. The main function of this is to test incoming water for silt


Wikiproject Gastropods
 This gastropod-related article is a stub. The class Gastropoda or the gastropods, also previously known as gasteropods, or univalves, and more commonly known as Snails You can help Wikipedia by expanding it.

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